Well, there is this cartoon: https://youtu.be/5CMtZs3GVQI?si=HUEWDB08g-zGsddh, where the big bad wolf inflates his chest (very erotically, in my opinion;)) while preparing to blow the three houses down. And I was just wondering what an anthropomorphic Lightning would look like if she inflated her chest like he does at the straw house, so there's an idea;).
As for the houses, I was thinking of a material that would pose a real challenge to her abilities. Y'know, one that she couldn't blow down in one go. Just suggesting.

That's a fun idea, having her huffing and puffing beside a straw house!

What kind of material would need more than one go? Lightning's lungs are pretty strong!

Hmm, now, I was hoping you had an idea for that. But if I had to chose, I would say cinder blocks or titanium or some other heavy metal. Sounds good, no?

Cinder blocks are similar to bricks.

Titanium or a heavy metal was what I was thinking! Tell me how you think Lightning blowing down a house of titanium would go. Be specific so I can envision this!

Well, something like this: the first time she puffs up like she always does, thinking it would work since it always had before, only to be left dumbfounded when the house only moves about an inch. So, she inhales deeper and blows up a storm and this time, the house bends with the wind, but still doesn't collapse. Only when she blows for the third time (cuz y'know, the rule of three), ridiculously strong, does she blow it apart and send the pieces flying over the mountains (quite literally;)). However, having overexerted herself, she collapses to the ground, panting and catching her breath. In the meantime, the tasty little pig she wanted to devour takes the opportunity to slip away with his/her life and by the time she's back on her feet, he/she is long gone.

There, that's what I have in mind. Thoughts?

Sounds fun! Maybe she realizes she needs to train her lungs even more so she can blow it down in 1 shot!

How big would she get when she huffs and puffs the 3rd time?

Well, maybe it wouldn't only be her chest that grows, maybe her muscles as well as her entire body could grow as big as the house, similar to the wolf from the video I sent. Although she wouldn't look fat, but her muscles would inflate. How's that for an idea?

Sounds interesting! An even bigger and badder Lightning!